Systems and methods for detecting an optically variable material

摘要

Systems and methods for detecting an optically variable material are provided, According to an illustrative embodiment, a method for detecting an optically variable material includes capturing a first image of al least a portion of a document while the at least a portion of the document is subjected to a first electromagnetic radiation from a first angle of incidence, and capturing a second image of at least a portion of the document while the at least a portion of the document is subjected to a second electromagnetic radiation from a second angle of incidence, The first angle of incidence is different from the second angle of incidence. The first and second images are captured by an imaging device that has a substantially fixed position. The method also includes comparing the first image to the second image to determine whether an optically variable material is present on the document.